Zip the nested Git repository to avoid submodule headaches

Author: bzaczynski

github-copilot-code-review/README.md

@@ -1,3 +1,9 @@
 # How to Use GitHub Copilot Code Review in Pull Requests
 
 This folder contains the supporting materials for the Real Python tutorial [How to Use GitHub Copilot Code Review in Pull Requests](https://realpython.com/github-copilot-code-review/).
+
+Unzip the `pop-quiz.zip` archive, which contains a separate Git repository with the following branches:
+
+- `main`
+- `feature/player-names`
+- `feature/player-names-final`